| Value |
Category |
| 1 |
1=Extremely useful |
| 2 |
2=Very useful |
| 3 |
3=Moderately useful |
| 4 |
4=Slightly useful |
| 5 |
5=Not at all useful |
| 6 |
6=Don't know |
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.